CVE-2026-82591 Open Asset Import Library Assimp MD5Loader.cpp MakeDataUnique heap-based overflow
A heap-based buffer overflow in Assimp's MD5 loader allows local attackers to execute arbitrary code or cause denial of service via crafted files.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-82591?
CVE-2026-82591 is a medium-severity memory corruption vulnerability in Open Asset Import Library Assimp, published on 30 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A security vulnerability has been detected in Open Asset Import Library Assimp up to 6.0.2. The impacted element is the function MD5Importer::MakeDataUnique of the file code/AssetLib/MD5/MD5Loader.cpp. The manipulation of the argument iNewIndex leads to heap-based buffer overflow. The attack can only be performed from a local environment. The identifier of the patch is bf9dabb617c46e5133dac65cca6bff177917afcb. Applying a patch is the recommended action to fix this issue.
Which versions are affected by CVE-2026-82591?
How do I fix CVE-2026-82591?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-82591 being exploited?
There is no known exploitation of CVE-2026-82591 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-82591, GHSA-4pff-rvgp-gggv, OESA-2026-4021, OESA-2026-4022, OESA-2026-4023, OESA-2026-4024 and 1 more.